Chihuahua Puppy Growth Chart

Refer to the following chart for a prediction of your Chihuahua puppy's growth. It uses a puppy's current age and weight to predict their future weight.

Identifying a Chihuahua pup's future size is important for a number of reasons; it allows owners to purchase the right size crate, bed, collar/harness, and knowing their future size will help owners make smarter decisions regarding their home and general environment.

While there's no way to know exactly just how large a puppy will become, this chart follows the normal growth patterns of purebred Chihuahuas. The chart itself is pretty self-explanatory; the first column represents a puppy's age, while the additional nine columns represent their corresponding weight. Simply find your puppy's current age on the left-hand column under 'Birth' and scroll to the right until you find their current weight. Once you've located your puppy's current age and weight, look at the bottom of the same column for their predicted weight as an adult.

Note: some of the factors which may affect a Chihuahua puppy's growth include:

  • Genetics
  • Nutrition (see our post on choosing food for your Chihuahua)
  • Physical activity levels
  • Hormones
  • Presence of worms (not always noticeable in their bowel movements)
  • Overall health
Birth 2½ oz. 2¾ oz. 3 oz. 3½ oz. 4 oz. 4¼ oz. 4½ oz. 5 oz. 5½ oz.
1 Week 3¾ oz 4 5 7 8 9
2 Week 5 7 9 10 11 12½ 13½
3 Week 6 7 8 9 11 13 14 16 17½
4 Week 7 8 11 13 15 17 19½ 21
5 Week 8 9 11 13 15 17 19½ 22 24
6 Week 9 11 12½ 15 17½ 20 22 24 27
7 Week 10 12 14½ 17 19½ 22 24½ 27 30
8 Week 11 13 16 19 21½ 24 27 29 33
9 Week 12 15 17¼ 20 23 26 29 32 35
10 Week 13 16 19 22 25 28 31 34 38
11 Week 14 17 21 24 27 31 34 37 42
12 Week 15 19 22 26 30 33 37 41 45
13 Week 16 20 24 28 32 36 40 44 49
14 Week 17 22 26 30 34 39 43 47 52
15 Week 18 23 28 32 37 41 46 51 56
16 Week 19 25 30 34 39 44 49 54 59
17 Week 20 26 31 36 41 46 51 57 62
18 Week 21 28 33 37 43 48 54 60 65
19 Week 22 29 34 39 44 50 56 62 67
20 Week 23 30 35 41 46 52 58 64 70
21 Week 24 31 36 42 48 54 60 66 72
22 Week 25 32 37 43 49 56 62 68 74
23 Week 26 33 38 44 50 57 64 70 76
24 Week 26 33 39 45 51 58 65 71 78
25 Week 27 34 40 46 52 59 66 72 79
26 Week 27 34 40 47 53 60 67 73 80
18 Months 2 lb. 2½ lb. 3 lb. 3½ lb. 4 lb. 4½ lb. 5 lb. 5½ lb. 6 lb.

Referencing your Chihuahua puppy's current weight and age using this chart will provide a rough estimation of their future size. However, the most accurate representation of a pup's future weight is through their parents. If you're looking to adopt a Chihuahua pup and want to know how large they will be as an adult, ask the breeder/current owner if you can see the parents. If both the parents are large, there's a good chance their pups will grow to a similar large size. Keep in mind that the AKC breed standard weight for a Chihuahua is under 6 pounds, which is also the top weight listed on this chart.

23 Responses to “Chihuahua Puppy Growth Chart”

  1. Deborah says:

    I am beyond horrible at any math or charts. My chi at age 16 weeks weighed 3 pounds and 3 ounces. I can’t figure out by these charts if she will be 5 1/2 pounds or 8 pounds. It really doesn’t matter if she stays very small,but I am older and if she stays on the smaller side,i would be able to bathe her in my sink. Can anyone give me a guesstimate of her full grown weight?

  2. Carolyn says:

    Here’s a suggestion! Based on the fact that many Chihuahua owners have Chihuahuas over the standard size limit, why don’t you publish something that meets up with reality! We aren’t concerned about CKC or AKC standards, we just want a guestimate of what our fur babies will weigh when adult.

  3. Stephanie Lucas says:

    Funny thing about what the breeders say about weight. When I got my foundation bitches my breeder told me “4 1/2 pounds if you feed dry dog food, 5 1/2 -6 if you feed her wet”.
    Very interesting response.
    Chihuahuas don’t breed true. Not with color or size. Strictly show breeders (because their show females would be inside weight restrictions) might more than home breeders (maybe)..
    But no one wants C section births so it’s usually little boys x bigger girls.

  4. chris says:

    Or is that normal for them to weigh that much

  5. chris says:

    My Pure-Breed Chihuahua weighs almost 9 lbs. what could be the problem?

    • Stephanie Lucas says:

      Breeders have traditionally saved the biggest and best females for breeding (to avoid C sections) and breed to smaller boys. So chihuahuas do not breed true and have several sizes of dogs in a litter.

      I have a beautiful 10 pound (and not fat) male who is head of security and took on a pit bull (ok maybe he’s not too bright). The only issues with size are in the show ring (which I don’t do) otherwise size is irrelevant.

  6. Andrea says:

    The chart is an estimate! Each individual puppy is the result of genetics, just like with human children one can be born small and grow to be 6 feet tall. It all has to do in the gene and pedigree of each puppy, the smallest in one litter could be 11 oz at 8 weeks and outgrow the biggest one from another litter. Why??? Because of genetics, buy from reputable breeders who know their lines. My chihuahuas were big puppies and have stayed under 2.5 lbs because the breeder knew the lines.

    • shelly faye says:

      um i dont my chiwawa would grow but she dosent eat a lot lately but do you think chiwawas grow beacause she s
      small and dosesnt grow like my yorkie either um umiko is a very playful dog um she poops everywhere in the house uh but the poop do sent smell bad because she always eat dog food like my yorkie does

  7. verlanemcdonald says:

    Cand i breed my pure breed 6 pound 7 ounce chihuahua with a 10 pound chihuahua male

  8. Natasha says:

    Wow, my puppies is way off the chart. She weighed 6.1 oz at birth, and now at 2 weeks old she is 1pound 5oz. Does that mean she is going to be like 10lbs when she is done growing?
    She is a purebred Chihuahua, and her parents both have papers, and are both around 5pounds.

    • Heather says:

      I wouldn’t do it. Rule of thumb: Always use a small stud. Smaller than the female. Female should never be the smaller of the two as the puppies could be too big for her to birth. They could get caught in the birth canal and a cesarean may be necessary. You could risk losing the puppies and even the Mother. Makes sense if ya think about it, ya know? Mom should always be bigger than Dad, full grown. Don’t let Mom get pregnant during her 1st heat. This is equivalent to a woman getting pregnant as a teenager. Good luck!

  9. Debbie says:

    Sorry I used connect the letters should have prof read 1st

  10. Debbie says:

    I think I was lied to the breader she ny puppy was 3 mos. but I think she was only 8 weeks so she looked smaller she is suppose to bbe between a tea cup and a mini I was told she was born Aug. 30 and as of today she weighs 2.2lbs and he back teeth r still not althe way out please let me know what you think

  11. Ellen Curtis says:

    I have a 15 week old chihuahua puppy. He is weighing at this time aprox 24 oz which puts him in the 2.5 to 3 lb category. How much food should I be feeding him so he will not get larger or fatter then he should be. I have 6 other chihuahuas all of which are chow hounds and over weight. I don’t want this to happen to this tiny little boy.

  12. tammy says:

    My pup is inline according to your chart to end up at 5.5lbs does gender have much influence on the size as I have heard that the females are often larger.

  13. Marco says:

    Excellent growth chart, thanks for the info, I’m a newly Chi owner and some things drive me MAD 😀 So I find your site very helpful, thanks again!

  14. Andrea says:

    I am a Chihuahua breeder and this is precise. Yes no one can be 100% sure of adult weight as lots of factors are involved but a good breeder should know the lines and have a good idea. I love this chart, great jobs guys.

  15. Shannon says:

    This growth chart was spot on! Thank u!

  16. Sherree says:

    We bought 2 chi sisters when they were 9 weeks old. They weighed 1 lb and the other was 12 oz. The vet didn’t know if she would ever make it to 3 lbs. In a few days they will be 8 months old…the 1 lb female now weights 5 lbs 7 oz (according to chart she should have ended up around 2 1/2 to 3 pounds, the other that weighed just 12 oz. is now 6 lbs. 11 oz. I seen both parents, their mother weighed 4 1/2 pounds, the father was 3 lbs. so you can NEVER go by this chart. It didn’t even come close for our two girls. Admittedly the 6 lb one is overweight…but not by 4 pounds. lol So be prepared to love your puppy no matter how big he or she gets because it may not stay the 2 to 3 pounds you thought it was going to.

    • Ellen Curtis says:

      I have had similar situations in 5 cases. I now have a new puppy weighing 1.5 oz at 15 wks. Don’t want him to get bigger them he supposed to. Told parents are 3 lbs and 2 lbs. he was only one in the liter. How much should I feed him per day so not to make him over weight?

  17. Mike says:

    Thanks My dog is doing just that. thinking it was some Type of sezure.Whenever she plays she starts

    • Rachelle says:

      Hi, I Raise Chihuahuas for show. I’ve taken a couple years off and just getting back into it
      This chart has been a helpful guide to keeping track of my puppies growth as weight change or lack thereof is the first thing that indicates if a tiny puppy is doing well or may be in trouble. I weigh mine each twice a day on a food scale for the first several weeks. When they are tiny it’s the fastest and most accurate way to discover if there are any problems and there by to save a puppy who for some reason just isn’t getting as much nutrition. It is pretty accurate with future weight as well but there is always a chance of a puppy being smaller or larger. This chart is just a guide and a very useful tool as well. Thank you.

      btw, using this chart as zip have, it has helped me and people I know act quickly enough to save more then a couple puppies.Thanks again!

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